The ornamental design for a device for playingballgames, as shown and described.
FIG. 1 is a top, perspective view of a device for playing ball games, showing our new design;
FIG. 2 is a top plan view thereof;
FIG. 3 is an edge elevational view thereof from the left of FIG. 2, the edge elevational view thereof from the side opposite that shown in FIG. 3 being identical thereto;
FIG. 4 is a bottom plan view thereof;
FIG. 5 is a view thereof from the top of FIG. 2; and,
FIG. 6 is a view thereof from the bottom of FIG. 2.